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Physics

Mechanics

Easy

Question

The height of the point vertically above the earth's surface, at which acceleration due to gravity becomes 1% of its value at the surface is (Radius of the earth =R)

8 R
98 R
10 R
20 R

The correct answer is: 98 R

$table attributes columnalign left end attributes row cell g to the power of apostrophe equals g open parentheses fraction numerator R over denominator R plus h end fraction close parentheses squared end cell row cell rightwards double arrow g over 100 equals g open parentheses fraction numerator R over denominator R plus h end fraction close parentheses squared rightwards double arrow fraction numerator R over denominator R plus h end fraction equals 1 over 10 rightwards double arrow h equals 9 R end cell end table$

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